<?php

if (!defined('IN_DZZ')) {
    exit('Access Denied');
}


class db_driver_mysqli {
    var $tablepre;
    var $version = '';
    var $drivertype = 'mysqli';
    var $querynum = 0;
    var $slaveid = 0;
    var $curlink;
    var $link = array();
    var $config = array();
    var $sqldebug = array();
    var $map = array();

    function db_mysql($config = array()) {
        if (!empty($config)) {
            $this->set_config($config);
        }
    }

    function set_config($config) {
        $this->config = &$config;
        $this->tablepre = $config['1']['tablepre'];
        if (!empty($this->config['map'])) {
            $this->map = $this->config['map'];
            for ($i = 1; $i <= 100; $i++) {
                if (isset($this->map['attachment']) && $i <= 10) {
                    $this->map['attachment_' . ($i - 1)] = $this->map['attachment'];
                }
                if (isset($this->map['user'])) {
                    $this->map['user_status'] =
                    $this->map['user_profile'] =
                    $this->map['user_field'] =
                        $this->map['user'];
                }
            }
        }
    }

    function linknum() {
        return $this->curlink;
    }

    function connect($serverid = 1) {

        if (empty($this->config) || empty($this->config[$serverid])) {
            $this->halt('config_db_not_found');
        }
        //兼容支持域名直接带有端口的情况
        if (strpos($this->config[$serverid]['dbhost'], ':') !== false) {
            list($dbhost, $port) = explode(':', $this->config[$serverid]['dbhost']);
            if ($port && empty($this->config[$serverid]['port'])) $this->config[$serverid]['port'] = $port;
            if ($dbhost) $this->config[$serverid]['dbhost'] = $dbhost;
        } elseif (strpos($this->config[$serverid]['dbhost'], '.sock') !== false) {//地址直接是socket地址
            $this->config[$serverid]['unix_socket'] = $this->config[$serverid]['dbhost'];
            $this->config[$serverid]['dbhost'] = 'localhost';
        }
        if (empty($this->config[$serverid]['port'])) $this->config[$serverid]['port'] = '3306';

        $this->link[$serverid] = $this->_dbconnect(
            $this->config[$serverid]['dbhost'],
            $this->config[$serverid]['dbuser'],
            $this->config[$serverid]['dbpw'],
            $this->config[$serverid]['dbcharset'],
            $this->config[$serverid]['dbname'],
            $this->config[$serverid]['pconnect'],
            $this->config[$serverid]['port'],
            $this->config[$serverid]['unix_socket']
        );
        $this->curlink = $this->link[$serverid];
    }

    function _dbconnect($dbhost, $dbuser, $dbpw, $dbcharset, $dbname, $pconnect, $port = '3306', $unix_socket = '', $halt = true) {
        mysqli_report(MYSQLI_REPORT_OFF);
        $link = new mysqli();
        if (!$link->real_connect($dbhost, $dbuser, $dbpw, $dbname, $port, $unix_socket)) {
            $halt && $this->halt('notconnect', $this->errno());
        } else {
            $this->curlink = $link;
            $link->options(MYSQLI_OPT_LOCAL_INFILE, false);
            $link->set_charset($dbcharset ? $dbcharset : $this->config[1]['dbcharset']);
            $serverset = 'sql_mode=\'\',';
            $serverset .= 'character_set_client=binary';
            $serverset && $link->query("SET $serverset");
        }
        return $link;
    }

    function table_name($tablename) {
        if (!empty($this->map) && !empty($this->map[$tablename])) {
            $id = $this->map[$tablename];
            if (!$this->link[$id]) {
                $this->connect($id);
            }
            $this->curlink = $this->link[$id];
        } else {
            $this->curlink = $this->link[1];
        }
        return $this->tablepre . $tablename;
    }

    function select_db($dbname) {
        return $this->curlink->select_db($dbname);
    }

    function fetch_array($query, $result_type = MYSQLI_ASSOC) {
        return $query ? $query->fetch_array($result_type) : null;
    }

    function fetch_first($sql) {
        return $this->fetch_array($this->query($sql));
    }

    function result_first($sql) {
        return $this->result($this->query($sql), 0);
    }

    public function query($sql, $silent = false, $unbuffered = false) {
        if (defined('DZZ_DEBUG') && DZZ_DEBUG) {
            $starttime = microtime(true);
        }

        if ('UNBUFFERED' === $silent) {
            $silent = false;
            $unbuffered = true;
        } elseif ('SILENT' === $silent) {
            $silent = true;
            $unbuffered = false;
        }
        $resultmode = $unbuffered ? MYSQLI_USE_RESULT : MYSQLI_STORE_RESULT;
        if (!($query = $this->curlink->query($sql, $resultmode))) {
            if (in_array($this->errno(), array(2006, 2013)) && substr($silent, 0, 5) != 'RETRY') {
                $this->connect();
                return $this->query($sql, 'RETRY' . $silent);
            }
            if (!$silent) {
                $this->halt($this->error(), $this->errno(), $sql);
            }
        }

        if (defined('DZZ_DEBUG') && DZZ_DEBUG) {
            $this->sqldebug[] = array($sql, number_format((microtime(true) - $starttime), 6), debug_backtrace(), $this->curlink);
        }

        $this->querynum++;
        return $query;
    }

    function affected_rows() {
        return $this->curlink->affected_rows;
    }

    function error() {
        return $this->curlink->error;
    }

    function errno() {
        return $this->curlink->errno;
    }

    function result($query, $row = 0) {
        if (!$query || $query->num_rows == 0) {
            return null;
        }
        $query->data_seek($row);
        $assocs = $query->fetch_row();
        return $assocs[0];
    }

    function num_rows($query) {
        $query = $query ? $query->num_rows : 0;
        return $query;
    }

    function num_fields($query) {
        return $query ? $query->field_count : null;
    }

    function free_result($query) {
        return $query ? $query->free() : false;
    }

    function insert_id() {
        return ($id = $this->curlink->insert_id) >= 0 ? $id : $this->result($this->query("SELECT last_insert_id()"), 0);
    }

    function fetch_row($query) {
        $query = $query ? $query->fetch_row() : null;
        return $query;
    }

    function fetch_fields($query) {
        return $query ? $query->fetch_field() : null;
    }

    function version() {
        if (empty($this->version)) {
            $this->version = $this->curlink->server_info;
        }
        return $this->version;
    }

    function escape_string($str) {
        return $this->curlink->escape_string($str);
    }

    function close() {
        return $this->curlink->close();
    }

    function halt($message = '', $code = 0, $sql = '') {
        throw new DbException($message, $code, $sql);
    }

}

?>